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Different dry transformers, the production of dry transformer material is not the same, the common dry transformer material is mainly copper and aluminum, the two materials of the dry transformer its function is not the same, so how to distinguish the dry transformer material is copper or aluminum? The following teach you some simple ways to distinguish, I hope to help you.
1, if the transformer manufacturer is an honest manufacturer, then it can be seen from the product model of the transformer nameplate, there are aluminum coils, must be with L(aluminum) letters. Such as open dry, all copper coil is SG, and aluminum coil should be SGL. Epoxy resin, all copper for SC(SCB, SCR, etc.), aluminum coil should be SCL.
2, there are bad manufacturers (should be very very few), low pressure in the inside with aluminum. The outer coils are made of copper. You can't tell the difference unless you take it apart.
3, of course, you can see the weight and volume of the transformer to distinguish, but you have no reference, it is not good to judge.
4, no matter what transformer manufacturer, should publicize your technology to the user. Even if it is an aluminum coil, the user should be informed. Give the price of aluminum coil. You can't sell copper at the same price as aluminum.
5, therefore, do not covet cheap, to go to the regular manufacturer to buy. Even if it is aluminum coil, as long as it is in line with national standards of aluminum coil drying, it can also be guaranteed quality.
The composition of the dry transformer is more, the composition of the structure is more complex, for the common dry transformer core is the heart of the dry transformer, is an important composition and structure.
Of course, the harm is the short circuit between the core pieces, the increase of eddy current circulation, the increase of iron loss, the increase of the heat of the core, and the serious damage will be caused by the local temperature rise is too high and the insulation of the adjacent parts will be endangered, and then the transformer will be burned. The main reason for core rust is that the surface rust treatment is not good, and it rusts when it is damp. For dry change may be the pre-rust removal is not clean, dip (brush) paint is not thorough, just the operating environment is damp. For oil change, the oil may be affected by moisture.
The above is the common dry transformer copper and aluminum main separation method and the main separation steps for your reference, you can ask our manufacturers and technical personnel to understand what other questions about the material of the dry transformer!
